/*页头和导航*/
#header {
    width: 100%;
    position: fixed;
    z-index: 999;

}

.breadcrumb {
    background-color: white;
    overflow: hidden;
    border-bottom: 1px solid silver;
}
#header span{
    position: relative;
    left: 1000px;
    top: -63px;
}
button{
    position: fixed;
    top: 5px;
    left: 1380px;
    overflow: hidden;
}



